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(Congo Red 4B, Cosmos Red, Cotton Red B, Cotton Red C, Direct Red 28, Direct Red R, Direct Red)
Certifiable Grade
| CAS Number: | 573-58-0 |
| Chemical Formula: | C32H22N6O6S2Na2 |
| Molecular Weight: | 696.67 g/mol |
Congo Red is a pH indicator (Blue to Red; range 3.0 - 5.0). A cytoplasmic stain for tissues fixed in Bouin’s as well as a specific stain for amyloid.
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